Formidable
Formidable adjective - Causing fear.
Vigorous and formidable are semantically related. in onerous topic. In some cases you can use "Vigorous" instead an adjective "Formidable".
Nearby Word: formidably
Vigorous
Vigorous adjective - Having active strength of body or mind.
Formidable and vigorous are semantically related. Sometimes you can use "Formidable" instead an adjective "Vigorous".
Cite this Source
Vigorous and Formidable. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/formidable/vigorous
Formidable & Vigorous. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/formidable/vigorous>.
Vigorous or Formidable. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/formidable/vigorous.
Google Ngram Viewer shows how "formidable" and "vigorous" have occurred on timeline